// Copyright 2018 the V8 project authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef V8_BUILTINS_GROWABLE_FIXED_ARRAY_GEN_H_
#define V8_BUILTINS_GROWABLE_FIXED_ARRAY_GEN_H_

#include "src/code-stub-assembler.h"

namespace v8 {
namespace internal {

    template <class T>
    using TNode = compiler::TNode<T>;

    // Utility class implementing a growable fixed array through CSA.
    class GrowableFixedArray : public CodeStubAssembler {
    public:
        explicit GrowableFixedArray(compiler::CodeAssemblerState* state)
            : CodeStubAssembler(state)
            , var_array_(this)
            , var_length_(this)
            , var_capacity_(this)
        {
            var_array_ = EmptyFixedArrayConstant();
            var_capacity_ = IntPtrConstant(0);
            var_length_ = IntPtrConstant(0);
        }

        TNode<IntPtrT> length() const { return var_length_.value(); }

        TVariable<FixedArray>* var_array() { return &var_array_; }
        TVariable<IntPtrT>* var_length() { return &var_length_; }
        TVariable<IntPtrT>* var_capacity() { return &var_capacity_; }

        void Push(TNode<Object> const value);

        TNode<JSArray> ToJSArray(TNode<Context> const context);

    private:
        TNode<IntPtrT> NewCapacity(TNode<IntPtrT> current_capacity);

        // Creates a new array with {new_capacity} and copies the first
        // {element_count} elements from the current array.
        TNode<FixedArray> ResizeFixedArray(TNode<IntPtrT> const element_count,
            TNode<IntPtrT> const new_capacity);

    private:
        TVariable<FixedArray> var_array_;
        TVariable<IntPtrT> var_length_;
        TVariable<IntPtrT> var_capacity_;
    };

} // namespace internal
} // namespace v8

#endif // V8_BUILTINS_GROWABLE_FIXED_ARRAY_GEN_H_
